How To Diagnose And Prevent New Car Engine Cylinders?

The symptoms of the engine cylinder are: when the cylinder is slightly pulled, the abnormal noise is generally difficult to hear, but experienced repair personnel can hear a squeaking noise in the crankcase at the engine oil port; when the cylinder is severe, the engine When you are at idle speed, you can clearly hear the sound of knocking and snoring, similar to the sound of the piston pin and the sound of the valve. At this time, it can be observed that: 1 water temperature rises; 2 oil pressure decreases; 3 smokes at the oil port; 4 power is significantly reduced, the machine shakes; 5 there is oil on the spark plug electrode; 6 sound is in the upper part of the cylinder. When encountering the new car pull cylinder, the piston connecting rod set should be removed in time, and the repair and assembly process requirements should be strictly inspected. When assembling the piston connecting rod set, the piston should be heated first, and the piston pin should be gently pressed by hand to avoid deformation of the piston skirt caused by the tapping. If the piston is deformed after assembly, it should be restored to its non-cylindrical degree (should be 0. 30 - 0.40mm); the gap of the Dongfeng automobile notched piston should be 0.05-0.07mm. In order to limit the speed of the new car (or overhaul) during the run-in period, and to ensure a good quality of the walk-through, a speed limiter has been installed at the bottom of the carburetor before leaving the factory. The new car should be carried out in strict accordance with the speed requirements in the instruction manual. Premature removal of the speed limiter is strictly prohibited. Usually, routine maintenance of the vehicle should be done, driving properly, regularly changing the lubricating oil, and strengthening the maintenance of the “three filters” (air, oil, and gasoline filter) to keep the vehicle in good technical condition.

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